Manufacture of cellulose.



PATEIHED MAB" E MORTBRUD.

MANUFACTURE OF GELLULOSE.

APPLICATION FILED APR. 11. 1906.

6 n w 4% M1 (1W "@ZTNXTIHZD STAT.

6; Way by way of v 1 .wf i'thml" 0.5 these we Sfi-tififfi tififljf' mindthe int in for ims abject to 'pnwide 4 a methmi f/t heating, whgrby thedigesting pracesxs may be married 01min. an efficient Way with miativelysum-H costs and wi ou', in-

e V opt-2 1 A may he bl'uught up m P fiTE-NT ()FFICEE.

ram/r3 Might quia'rk iy, whwaupon 0H6 amcnts; 1194f. cut out 0f the 05mmra swm Em Ming; :rspaireci m Meme-d I 1 time m'i; 119 by of the aiamnts. heamng the di may: in this :manney thie circulaticn Wiil f0 .1. andquick and, thmefom tha was vziil be 'shed in 911mm! time the saw, whenswam cuiis are piafiad insalda the digasterl in this "wavy it; aimFeasible to use steam of a, higher temp-Tamra.

The; mmexed drawing skews :1 aystem embodying the invention.

A the digester {shown in sectiun) 11110118: 51116 hem taxi, C is themmmcting pipe hefiWfl-iiflt the imvermest point the digesmr and H12l'zea ting apgrmmt-ua, 1D is a, wilw interpesed in said. comma'ting pipeand E a strainer hat tom, heated in ids of the digester, 610% be maththe dis 1 ,rge mime G is a tube through which the top 0f the hamingapparatus cemmunimi-es with the in- L g I bfiliGI 01" m boiler. 'Inistube is also provided with a valve H and preferably with a PBYfGI'ELtBdnozziq, which may be situated be iowfamd mare 0r iass distant from thetop nf the boiler, whereby the simulation of the liquid Within thedigester may be regulated and suitable temperature attained through.911i} the cbntems of aha digester.

this mnstmctimml fsr'm 0f the aystel'n the heating apparatus is(snmposed of am mg gmgation 0f tubesKin.cl0sed in a c lindriml box andopening into shambers L, I res ectively 51's the top and bottom of said10K. The, liquid pass s thmugh fiwsa tubes and is heafied by the steamentering at N and passing along betwsscn and amunci the tubes.

disclmrge opsningfm tha con-- densed Water.

U a more A a-pid eiraufimicm 1' s desir e i than $31 pwducsd by finedifierema oft-empflrw 13mm only, a'ui': ble 'me'chmximl means may be empiqyed "$0 attain this tion through the central part 01 h rli ester, Imy invention, I have signed my name in maintaining the circulauonthrough the presence of two subscribing Witnesses. heater and digest-e1and thereby maintain- EINAR MORTERUD. ing substantially a constanttemperature Witnesses:

throughout the contents of the digester, suh- HENRY BORDEWICH,

stantially as described. MICHAEL ALGER.

duce an upwardly directed current of solu- In testimonythat 7. claim theforegoing as

